JP3761503B2 - Scroll fluid machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scroll fluid machine used as an air compressor, a vacuum pump, a refrigerant gas compressor, a compressor for an oxygen suction machine, or the like.
[0002]
[Prior art]
In a conventional scroll fluid machine, a fixed scroll is attached to the casing of an eccentric orbiting drive device that performs eccentric orbiting rotation that rotates eccentrically around a predetermined axis, and the orbiting scroll is attached to the orbiting shaft of the eccentric orbiting drive device. The fixed scroll and the orbiting scroll are provided with wraps.
[0003]
[Problems to be solved by the invention]
However, in such a scroll fluid machine, if the center line of the orbiting scroll deviates from the center line of the fixed scroll, the contact pressure between the orbiting scroll and the fixed scroll cannot be maintained properly and uniformly. The transformed gas cannot be efficiently transformed.
[0004]
The present invention has been made to solve the above-described problems, and an object thereof is to provide a scroll fluid machine capable of efficiently transforming a fluid to be transformed.
[0005]
[Means for Solving the Problems]
In order to achieve this object, in the present invention, in a scroll fluid machine having an eccentric turning drive device and a fluid machine main body driven by the eccentric turning drive device, the scroll turning machine is attached to the turning shaft of the eccentric turning drive device. The orbiting scroll of the fluid machine main body is attached to the main body turning shaft or the turning shaft of the eccentric turning drive device, the turning shaft of the main body turning shaft or the eccentric turning drive device is passed through the turning scroll, and on both sides of the turning scroll. First and second eccentric turning support means are provided for supporting the main body turning shaft or the turning shaft of the eccentric turning drive device in an eccentric turning manner with respect to the fixed scroll of the fluid machine body.
[0006]
Further, in a scroll fluid machine having a motor and a fluid machine main body driven by the motor, the orbiting scroll of the fluid machine main body is attached to a main body turning shaft, the main body turning shaft is passed through the turning scroll, and the turning The rotating body attached to the output shaft of the motor or the output shaft of the motor is rotatably supported on the fixed scroll of the fluid machine main body on the motor side of the scroll, and is mounted on the rotating body or the output shaft of the motor. A third eccentric turning support means for supporting the main body turning shaft so as to be rotatable eccentrically is provided, and the main body turning shaft can be turned eccentrically with respect to the fixed scroll on the side opposite to the motor side than the turning scroll. Provided with a fourth eccentric turning support means for supporting the main body turning shaft and allowing the main body turning shaft to rotate. Providing a rotation preventing means for stopping.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic sectional view showing a scroll fluid machine according to the present invention. As shown in the figure, a fixed scroll 3 is attached to an eccentric turning drive device 1 that performs an eccentric turning drive that rotates eccentrically around a predetermined axis and does not rotate, and the fixed scroll 3 is provided with a spiral wrap. . Further, the main body turning shaft 5 is attached to the turning shaft 2 of the eccentric turning drive device 1 via the attachment 4, and the center line of the turning shaft 2 coincides with the center line of the main body turning shaft 5. The orbiting scroll 6 is attached to the main body turning shaft 5 , and the main body turning shaft 5 passes through the orbiting scroll 6. The scroll body 7 of the orbiting scroll 6 has an upper wrap 8 and the same shape as the wrap of the fixed scroll 3. A lower wrap 9 is provided, and the upper wrap 8 of the orbiting scroll 6, the lower wrap 9 and the wrap of the fixed scroll 3 overlap each other, and a plurality of variable pressure chambers are formed. In addition, the rotating body 10 is rotatably supported via a bearing 11 on the side of the orbiting scroll 6 of the fixed scroll 3 via a bearing 11, and the rotation center line of the rotating body 10 is the rotation axis ( This coincides with the rotation center line described later. Further, the main body turning shaft 5 is rotatably supported by the rotating body 10 via the bearing 12, and the center line of the rotating body 10 and the center line of the main body turning shaft 5 are biased. That is, the main body turning shaft 5 is eccentrically supported by the rotating body 10 and is rotatably supported. And the 1st eccentric turning support means 13 which supports the main body turning shaft 5 so that eccentric turning is possible with respect to the fixed scroll 3 by the rotary body 10 etc. is comprised, and the eccentric turning support means 13 is eccentric turning drive rather than the turning scroll 6. FIG. It is provided on the device 1 side. A rotating body 14 is rotatably supported via a bearing 15 on the opposite side of the orbiting scroll 6 of the fixed scroll 3 to the eccentric orbiting driving device 1 side, and the rotation center line of the rotating body 14 has an eccentric orbiting driving device 1. The rotation center line of the rotation axis coincides with the rotation center line of the rotating body 10. Further, the main body turning shaft 5 is rotatably supported by the rotating body 14 via the bearing 16, and the center line of the rotating body 14 and the center line of the main body turning shaft 5 are biased. That is, the main body turning shaft 5 is eccentrically supported by the rotating body 14 and is rotatably supported. Then, a second eccentric turning support means 17 is configured to support the main body turning shaft 5 so as to be capable of eccentric turning with respect to the fixed scroll 3 by the rotating body 14 or the like. The eccentric turning support means 17 is more eccentrically driven than the turning scroll 6. It is provided on the side opposite to the device 1 side. And the fluid machine main body 18 driven by the eccentric turning drive device 1 is constituted by the fixed scroll 3, the turning scroll 6, and the like.
[0008]
2 is a schematic cross-sectional view showing the eccentric turning drive device of the scroll fluid machine shown in FIG. 1, and FIG. 3 is a cross-sectional view showing a part of the eccentric turning drive device shown in FIG. As shown in the figure, a stator 22 is fixed to a casing 21, a rotary shaft 24 is rotatably supported on the casing 21 via a bearing 23, and a rotor 25 is fixed to the rotary shaft 24. A motor (electric motor) is configured. Further, the rotating shaft 2 is rotatably supported by the rotating shaft 24 through bearings 26 and 27, and the center line of the rotating shaft 24 and the center line of the rotating shaft 2 are biased. That is, the turning shaft 2 is eccentrically supported by the rotating shaft 24 and is rotatably supported. A swivel plate 28 is attached to the swivel shaft 2, and three pin cranks 29 are provided between the casing 21 and the swivel plate 28. The crank body 30 of the pin crank 29 is provided with shafts 31 and 32, and the center line of the shaft 31 and the center line of the shaft 32 are decentered. Equal to the amount of eccentricity with the center line. Further, the shaft 31 of the pin crank 29 is rotatably supported by the casing 21 via a bearing 33, and the shaft 32 of the pin crank 29 is rotatably supported by the swivel plate 28 via a bearing 34. The turning plate 28, the pin crank 29, and the like constitute rotation prevention means 35 that allows the turning shaft 2 to turn eccentrically and prevents the turning shaft 2 from rotating.
[0009]
In this scroll fluid machine, the rotating shaft 24 and the rotor 25 rotate, and the turning shaft 2 turns eccentrically around the center line of the rotating shaft 24. However, since the rotation preventing means 35 is provided, the turning shaft 2 is Does not rotate. For this reason, since the orbiting shaft 2, the main body orbiting shaft 5, and the orbiting scroll 6 rotate eccentrically without rotating with respect to the casing 21 and the fixed scroll 3, the variable pressure chamber formed between the orbiting scroll 6 and the fixed scroll 3. Gradually shrinks. Therefore, the gas to be transformed such as air is transformed in the transformation room.
[0010]
In such a scroll fluid machine, the main body turning shaft 5 is supported by the eccentric turning support means 13 and 17 so as to be capable of eccentric turning on the both sides of the turning scroll 6 of the fluid machine body 18. When the orbiting scroll 6 rotates eccentrically without rotating with respect to the fixed scroll 3, it is possible to reliably prevent the center line of the orbiting scroll 6 from deviating from the center line of the fixed scroll 3. The contact pressure between 6 and the fixed scroll 3 can be maintained appropriately and uniformly, and the gas to be transformed can be efficiently transformed.
[0011]
FIG. 4 is a schematic sectional view showing another scroll fluid machine according to the present invention. As shown in the figure, the orbiting scroll 6 is attached to the orbiting shaft 2 of the eccentric orbiting drive device 1, and the orbiting shaft 2 of the eccentric orbiting drive device 1 passes through the orbiting scroll 6, and the eccentric orbiting support means 13 and 17 The orbiting shaft 2 is supported so as to be eccentrically rotatable with respect to the fixed scroll 3. That is, the first eccentric orbiting support means 13 that supports the orbiting shaft 2 so as to be eccentrically rotatable with respect to the fixed scroll 3 by the rotating body 10 or the like is configured, and the orbiting shaft 2 is supported with respect to the fixed scroll 3 by the rotating body 14 or the like. A second eccentric turning support means 17 that supports the eccentric turning is configured. The other configuration is the same as that of the scroll fluid machine shown in FIG.
[0012]
Even in such a scroll fluid machine, it is possible to reliably prevent the center line of the orbiting scroll 6 from deviating from the center line of the fixed scroll 3, so that the contact pressure between the orbiting scroll 6 and the fixed scroll 3 can be prevented. Can be maintained appropriately and uniformly, and the gas to be transformed can be efficiently transformed.
[0013]
FIG. 5 is a schematic front sectional view showing another scroll fluid machine according to the present invention, and FIG. 6 is a schematic plan view showing the scroll fluid machine shown in FIG. As shown in the figure, a fixed scroll 43 is attached to a motor (electric motor) 41, and the fixed scroll 43 is provided with a spiral wrap. Further, the rotating body 45 is attached to the output shaft 42 of the motor 41 via the attachment 44, and the center line of the output shaft 42 and the center line of the rotating body 45 coincide with each other. Further, a rotating body 45 is rotatably supported via a bearing 46 closer to the motor 41 than a turning scroll 50 (described later) of the fixed scroll 43, and the main body turning shaft 49 can be rotated to the rotating body 45 via a bearing 47. The center line of the rotating body 45 and the center line of the main body turning shaft 49 are biased. That is, the main body turning shaft 49 is eccentrically supported by the rotating body 45 so as to be rotatable. Then, the third eccentric turning support means 48 is configured to rotatably support the rotating body 45 on the fixed scroll 43 by the bearings 46, 47 and the like and to support the main body turning shaft 49 so as to be eccentric and rotatable with respect to the rotating body 45. The eccentric turning support means 48 is provided closer to the motor 41 than the turning scroll 50, and the eccentric turning support means 48 supports the main body turning shaft 49 so as to be eccentrically turnable with respect to the fixed scroll 43. The orbiting scroll 50 is attached to the main body turning shaft 49 , and the main body turning shaft 49 penetrates the orbiting scroll 50. The scroll main body 51 of the orbiting scroll 50 has an upper wrap 52 and the same shape as the wrap of the fixed scroll 43. A lower wrap 53 is provided, and the upper wrap 52 of the orbiting scroll 50, the lower wrap 53 and the wrap of the fixed scroll 43 overlap each other, and a plurality of variable pressure chambers are formed. In addition, a rotating body 55 is rotatably supported via a bearing 56 on the opposite side of the rotating scroll 50 of the fixed scroll 43 to the motor 41, and the rotation center line of the rotating body 55 is the rotation center line of the rotating body 45. Match. Further, the main body turning shaft 49 is rotatably supported by the rotating body 55 via the bearing 57, and therefore, the center line of the rotating body 55 and the center line of the main body turning shaft 49 are biased. That is, the main body turning shaft 49 is eccentrically supported by the rotating body 55 and is rotatably supported. And the 4th eccentric turning support means 58 which supports the main body turning shaft 49 so that eccentric turning is possible with respect to the fixed scroll 43 by the rotary body 55 grade | etc., Is comprised, and the eccentric turning support means 58 is the motor 41 side rather than the turning scroll 50. It is provided on the opposite side. Also, three pin cranks 54 are provided between the fixed scroll 43 and the main body turning shaft 49. The crank body of the pin crank 54 is provided with two shafts, and the center lines of the two shafts of the pin crank 54 are eccentric. The amount of eccentricity is the amount of eccentricity between the rotating bodies 45 and 55 and the main body turning shaft 49 ( Eccentricity between the center line of the rotating bodies 45 and 55 and the center line of the main body turning shaft 49). The support structure for the two shafts of the pin crank 54 to the fixed scroll 43 and the main body turning shaft 49 is the same as the support structure to the casing 21 and the turning plate 28 of the shafts 31 and 32 of the pin crank 29 shown in FIG. In addition, the pin crank 54 or the like constitutes an anti-rotation means for allowing the main body turning shaft 49 to turn eccentrically and preventing the main body turning shaft 49 from rotating. A fluid machine main body 59 driven by the motor 41 is constituted by the fixed scroll 43, the orbiting scroll 50, and the like.
[0014]
In this scroll fluid machine, when the output shaft 42 is rotated by operating the motor 41, the rotating body 45 rotates, and the main body turning shaft 49 rotates eccentrically around the center line of the rotating body 45. Since it is provided, the main body turning shaft 49 does not rotate. For this reason, since the main body turning shaft 49 and the turning scroll 50 turn eccentrically without rotating with respect to the fixed scroll 43, the variable pressure chamber formed between the turning scroll 50 and the fixed scroll 43 is gradually reduced. Therefore, the gas to be transformed such as air is transformed in the transformation room.
[0015]
In such a scroll fluid machine, the main body turning shaft 49 is supported on the fixed scroll 43 so as to be eccentrically turnable by the eccentric turning support means 48 and 58 on both sides of the turning scroll 50 of the fluid machine main body 59. When the orbiting scroll 50 rotates eccentrically without rotating with respect to the fixed scroll 43, it is possible to reliably prevent the center line of the orbiting scroll 50 from deviating from the center line of the fixed scroll 43. The contact pressure between 50 and the fixed scroll 43 can be maintained appropriately and uniformly, and the gas to be transformed can be efficiently transformed.
[0016]
FIG. 7 is a schematic sectional view showing another scroll fluid machine according to the present invention. As shown in the figure, the output shaft 42 of the motor 41 is rotatably supported by the fixed scroll 43 via a bearing 46, and the main body turning shaft 49 is rotatably supported by the output shaft 42 via a bearing 47. That is, the third eccentric turning support means 48 is configured to rotatably support the output shaft 42 on the fixed scroll 43 by the bearings 46, 47 and the like and to support the main body turning shaft 49 so as to be rotatable eccentrically with respect to the output shaft 42. Yes. The other configuration is the same as that of the scroll fluid machine shown in FIG.
[0017]
In such a scroll fluid machine as well, it is possible to reliably prevent the center line of the orbiting scroll 50 from deviating from the center line of the fixed scroll 43, and therefore the contact pressure between the orbiting scroll 50 and the fixed scroll 43. Can be maintained appropriately and uniformly, and the gas to be transformed can be efficiently transformed.
[0018]
In the above embodiment, the rotation prevention means 35 having the pin crank 29 and the rotation prevention means having the pin crank 54 are used as the rotation prevention means. However, the rotation prevention means having an Oldham ring is used as the rotation prevention means. May be.
[0019]
【The invention's effect】
In the scroll fluid machine according to the present invention, it is possible to reliably prevent the center line of the orbiting scroll from deviating from the center line of the fixed scroll, and therefore it is possible to efficiently transform the fluid to be transformed.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a scroll fluid machine according to the present invention.
FIG. 2 is a schematic cross-sectional view showing an eccentric turning drive device of the scroll fluid machine shown in FIG. 1;
FIG. 3 is a cross-sectional view showing a part of the eccentric turning drive device shown in FIG. 2;
FIG. 4 is a schematic sectional view showing another scroll fluid machine according to the present invention.
FIG. 5 is a schematic front sectional view showing another scroll fluid machine according to the present invention.
6 is a schematic plan view showing the scroll fluid machine shown in FIG. 5. FIG.
FIG. 7 is a schematic sectional view showing another scroll fluid machine according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Eccentric turning drive device 2 ... Turning axis 3 ... Fixed scroll 5 ... Main body turning axis 6 ... Turning scroll 7 ... Scroll main body 8 ... Upper lap 9 ... Lower wrap 13 ... First eccentric turning support means 17 ... Second eccentricity Turning support means 18 ... Fluid machine main body 41 ... Motor 42 ... Output shaft 43 ... Fixed scroll 45 ... Rotating body 48 ... Third eccentric turning support means 49 ... Main body turning shaft 50 ... Turning scroll 51 ... Scroll body 52 ... Upper wrap 53 ... Lower wrap 58 ... Fourth eccentric turning support means 59 ... Fluid machine main body

Claims (2)

In a scroll fluid machine having an eccentric turning drive device and a fluid machine body driven by the eccentric turning drive device, a main body turning shaft attached to the turning shaft of the eccentric turning drive device or a turning shaft of the eccentric turning drive device The orbiting scroll of the fluid machine main body is attached to the orbiting scroll, the orbiting shaft of the eccentric orbiting drive device is passed through the orbiting scroll, and the orbiting scroll is fixed to the fixed scroll of the fluid machine body on both sides of the orbiting scroll. A scroll fluid machine comprising first and second eccentric turning support means for supporting a main body turning shaft or a turning shaft of the eccentric turning drive device in an eccentric turning manner. In a scroll fluid machine having a motor and a fluid machine main body driven by the motor, the orbiting scroll of the fluid machine main body is attached to a main body turning shaft, and the main body turning shaft is passed through the orbiting scroll. Further, on the motor side, the rotating body attached to the output shaft of the motor or the output shaft of the motor is rotatably supported on the fixed scroll of the fluid machine body, and is eccentric to the rotating body or the output shaft of the motor. A third eccentric orbiting support means for rotatably supporting the main body turning shaft is provided, and the main body rotating shaft is supported so as to be eccentrically rotatable with respect to the fixed scroll on a side opposite to the motor side than the orbiting scroll. A fourth eccentric turning support means for allowing the main body turning shaft to turn eccentrically and preventing the main body turning shaft from rotating. Scroll fluid machine characterized in that a rotation preventing means.

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